Lowest Achievable Control Technology

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Lowest Achievable Control Technology (LAER) is a pollution control standard created by the Environmental Protection Agency and is used to determine what air pollution control technology will be used to control a specific pollutant to a specified limit. At the discretion of the overseeing regulatory agency, the Local, State, or Federal EPA, LAER may apply to any source, either existing or new, and is used to limit a source to the lowest achievable emissions possible based on commercially available technology, and in some instances on non-commercial experimental or demonstration technologies.

The LAER standard is the most stringent standard set forth by the EPA and applied only in extreme circumstances.